1 /* ncmpc (Ncurses MPD Client)
2 (c) 2004-2017 The Music Player Daemon Project
3 Project homepage: http://musicpd.org
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions
7 are met:
9 - Redistributions of source code must retain the above copyright
10 notice, this list of conditions and the following disclaimer.
12 - Redistributions in binary form must reproduce the above copyright
13 notice, this list of conditions and the following disclaimer in the
14 documentation and/or other materials provided with the distribution.
16 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
20 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
24 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
25 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
29 #include "aconnect.h"
30 #include "net/async_rconnect.h"
31 #include "net/socket.h"
32 #include "Compiler.h"
34 #include <mpd/client.h>
35 #include <mpd/async.h>
37 #include <glib.h>
39 #include <assert.h>
40 #include <string.h>
41 #include <stdio.h>
42 #include <errno.h>
44 struct aconnect {
45 const struct aconnect_handler *handler;
46 void *handler_ctx;
48 struct async_rconnect *rconnect;
50 int fd;
51 guint source_id;
52 };
54 static gboolean
55 aconnect_source_callback(gcc_unused GIOChannel *source,
56 gcc_unused GIOCondition condition,
57 gpointer data)
58 {
59 struct aconnect *ac = data;
60 assert(ac->source_id != 0);
61 ac->source_id = 0;
63 char buffer[256];
64 ssize_t nbytes = recv(ac->fd, buffer, sizeof(buffer) - 1, 0);
65 if (nbytes < 0) {
66 snprintf(buffer, sizeof(buffer),
67 "Failed to receive from MPD: %s",
68 strerror(errno));
69 close_socket(ac->fd);
70 ac->handler->error(buffer, ac->handler_ctx);
71 g_free(ac);
72 return false;
73 }
75 if (nbytes == 0) {
76 close_socket(ac->fd);
77 ac->handler->error("MPD closed the connection",
78 ac->handler_ctx);
79 g_free(ac);
80 return false;
81 }
83 buffer[nbytes] = 0;
85 struct mpd_async *async = mpd_async_new(ac->fd);
86 if (async == NULL) {
87 close_socket(ac->fd);
88 ac->handler->error("Out of memory", ac->handler_ctx);
89 g_free(ac);
90 return false;
91 }
93 struct mpd_connection *c = mpd_connection_new_async(async, buffer);
94 if (c == NULL) {
95 mpd_async_free(async);
96 ac->handler->error("Out of memory", ac->handler_ctx);
97 g_free(ac);
98 return false;
99 }
101 ac->handler->success(c, ac->handler_ctx);
102 g_free(ac);
103 return false;
104 }
106 static void
107 aconnect_rconnect_success(int fd, void *ctx)
108 {
109 struct aconnect *ac = ctx;
110 assert(ac->rconnect != NULL);
111 ac->rconnect = NULL;
113 ac->fd = fd;
115 GIOChannel *channel = g_io_channel_unix_new(fd);
116 ac->source_id = g_io_add_watch(channel, G_IO_IN,
117 aconnect_source_callback, ac);
118 g_io_channel_unref(channel);
119 }
121 static void
122 aconnect_rconnect_error(const char *message, void *ctx)
123 {
124 struct aconnect *ac = ctx;
125 assert(ac->rconnect != NULL);
126 ac->rconnect = NULL;
128 ac->handler->error(message, ac->handler_ctx);
129 g_free(ac);
130 }
132 static const struct async_rconnect_handler aconnect_rconnect_handler = {
133 .success = aconnect_rconnect_success,
134 .error = aconnect_rconnect_error,
135 };
137 void
138 aconnect_start(struct aconnect **acp,
139 const char *host, unsigned port,
140 const struct aconnect_handler *handler, void *ctx)
141 {
142 struct aconnect *ac = g_new(struct aconnect, 1);
143 ac->handler = handler;
144 ac->handler_ctx = ctx;
146 *acp = ac;
148 async_rconnect_start(&ac->rconnect, host, port,
149 &aconnect_rconnect_handler, ac);
150 }
152 void
153 aconnect_cancel(struct aconnect *ac)
154 {
155 if (ac->rconnect != NULL)
156 async_rconnect_cancel(ac->rconnect);
157 else {
158 g_source_remove(ac->source_id);
159 close_socket(ac->fd);
160 }
162 g_free(ac);
163 }